Sonnedix financing shifts Southern Europe solar portfolio toward storage-backed growth

Sonnedix has secured €730 million in financing to refinance, optimise and build renewable assets across Italy, Spain, Portugal and France. The transaction covers about 540MW of solar photovoltaic capacity and two battery energy storage system assets, strengthening the company’s ability to combine generation and storage across Southern European power markets.

Sonnedix has completed a €730 million financing package covering renewable energy assets in Italy, Spain, Portugal and France, providing capital for refinancing, optimisation and construction. The transaction encompasses photovoltaic projects with approximately 540MW of combined capacity, alongside two battery energy storage system (BESS) assets. Italy represents the largest portion of the portfolio, with more than 350MW of capacity included in the financing.

The financing gives Sonnedix additional financial capacity to advance projects while reshaping its portfolio around a combination of solar generation and energy storage. By refinancing operating and development assets while incorporating BESS projects, the company can expand its hybridisation strategy, linking intermittent renewable generation with flexible capacity that can respond to changing electricity-market conditions.

The development is significant for Southern Europe’s renewable power sector, where rising solar penetration is increasing the importance of grid flexibility, dispatchable capacity and effective management of periods of oversupply. Storage can help renewable operators shift electricity availability toward higher-demand periods and improve the operational value of solar assets. The financing therefore extends beyond conventional project funding by supporting a portfolio model that integrates generation and storage.

Italy is particularly relevant to the transaction because of the scale of assets allocated there, while Spain, Portugal and France remain important markets for utility-scale renewable development. Developers, lenders, grid operators, equipment suppliers and corporate electricity buyers across these markets may be affected as hybrid solar-and-storage projects become a larger component of new power infrastructure. The transaction also involves a broad banking group comprising AIB, CACIB, CIBC, ING, Intesa Sanpaolo, Sabadell, Santander CIB, Societe Generale and UniCredit.

For investors and energy companies, the financing highlights a growing shift from standalone renewable generation toward more flexible asset portfolios. Access to large-scale financing can enable developers to refinance mature projects while preserving capital for new construction and storage deployment. It may also improve the ability of renewable operators to serve customers seeking more predictable electricity supply and strengthen their position as European power systems absorb higher volumes of variable renewable generation.

Sonnedix is a global renewable energy company focused on developing, acquiring, constructing and operating solar, wind and energy-storage projects. Its portfolio totals about 12GW, including more than 1GW under construction, 4GW in operation and a 6GW development pipeline across markets including Europe, Chile and Japan. The latest financing supports continued expansion of that portfolio while increasing the role of storage within its Southern European operations.